Same here, the things people are starting to do with 3D printers is getting quite impressive and interesting, certainly I imagine 3D printers have contributed greatly to the proliferation of 3rd party products.
It will be interesting to where we are 10 years from now, and not just regarding hobbies, will we be printing house hold objects out at home? And then there will be the looming issue of copyright of objects, or at least the template thereof.
I'm sure that's the last thing Hasbro and other toymakers want.